Information technology
(IT) The hardware, firmware, and software used as part of the information system to perform DoD information functions. This definition includes computers, telecommunications, automated information systems, and automatic data processing equipment. IT includes any assembly of computer hardware, software, and/or firmware configured to collect, create, communicate, compute, disseminate, process, store, and/or control data or information.

Source:
http://www.dtic.mil/whs/directives/corres/pdf/
i520040_123097/i520040p.pdf